code: def is_json_metadata(text):
      """Is this a JSON metadata?"""
      first_curly_bracket = text.find("{")
      if first_curly_bracket < 0:
          return False
  
      first_equal_sign = text.find("=")
      if first_equal_sign < 0:
          return True
  
      return first_curly_bracket < first_equal_sign
  
imports: import ast
  import re
  from json import dumps, loads
  from .languages import _JUPYTER_LANGUAGES
label_desc: Use image node_id 15 for calling a global function with example usage: is_json_metadata(text) and returns: unknown, False, True